This set of six Oceroll water filter cartridges is a great choice for those who want to keep their water clean and fresh. The cartridges are compatible with a variety of Brita Maxtra+ style XL refill and counter top filters, making it easy to use them with your favorite water jug or coffee machine. Each cartridge has a capacity of 150 and is designed to remove chlorine taste and odor from your water. The filtration method uses carbon/charcoal to remove contaminants, and the cartridges have a life of one month. The set includes six cartridges, suitable for use with Amazon Basics, Dafi Unimax, Waterdrop, Mavea, Aqua Optima Evolve, and Brita Maxtra+ models.